US Bridges

I 80 over Stream

Fair

Iowa County, Iowa · 0.7 Mi. E of Jct. US 151 · Structure no. 000000000029920

Built
1963
62 years old
Condition
Fair
inspected August 2024
Type
Culvert
Concrete Continuous
Length
46 ft
3 main spans
Daily traffic
33,000
2023 count
Owner
State
State Highway Agency

About this bridge

I 80 over Stream is a concrete continuous culvert carrying I 80 over Stream in Iowa County, Iowa. It was built in 1963, so it is 62 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 33,000 vehicles a day, roughly 35% of them trucks, projected to reach 33,000 by 2044. The structure is 46 ft (14 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 80
CrossesStream
Location0.7 Mi. E of Jct. US 151
RouteInterstate 80
CountyIowa County
StateIowa
Coordinates41.68737, -91.89782
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating32.8 US tons
Inventory rating19.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length46 ft (14 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic33,000 (2023)
Projected traffic33,000 by 2044
Trucks35%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was I 80 over Stream built?

It was built in 1963, making it 62 years old in 2025.

What condition is I 80 over Stream in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2024.

How much traffic does I 80 over Stream carry?

About 33,000 vehicles per day (2023 count), of which roughly 35% are trucks.

How long is I 80 over Stream?

The structure is 46 ft (14 m) long with a longest span of 12 ft (3.7 m).

Who owns I 80 over Stream?

It is owned by the State Highway Agency.